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(No Model.)

G. B. ROSS.

STEAM TRAP. No. 392,366. Patented Nov. 6, 1888.

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PATENT OEEICEo GEORGE'B. BOSS, OF BUFFALO, NEW YORK.

j STEAM-TRAP.

PECIFICATION forming' part of Letters Patent No. 392,366, dated November 6l 1888. v

' Application nieaMnrcheaisse. seriniivpesmfz. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE B. Ross, a citizen of the United States, residing in Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Steam-Traps, of which the following is a specification.

My invention relates to that kind of steamtraps in which the expansion and contraction of a metal tube into which the steam passes are used for the purpose of keeping the outletvalve closed while the trap is filled with steam and opening again when the temperature is lowered by the steam condensing, so as to open the valve at a lowv temperature and close it at a given higher temperature, a's will be fully and clearly hereinafter described and claimed,

reference being had to the accompanying drawings, in which- Figure 1 is a vert-ical longitudinal section through the center of the trap, cutting through all except the valve, valve-stem, and valve socket, stem, or rod. Fig. 2 is an end elevation4 of the trap and valve-chamber. Fig. 3 is a plan of the valve-stem guide. Fig. 4 is a cross'section through the trap in or about line a b, Fig. 1, looking in the direction of the arrow o,- and Fig. 5 is an end elevation of the back head.

Myinvention is designed for passengertrain or other service where a steam-trap is required.

The brass expanding and contracting tube l a Wrench-section, 9. The object of the removable plug is to leave an opening large enough to permit the valve4 to be removed or putin place, after which the plug is screwed back to close the opening steam-tight.

10 is the outlet-nozzle, and 11 represents an ordinary stufii ng-box through which the valvestem passes, and is secured bya pin, 13, in the socket 14.

The head 2 is secured to the tube 1 by the usual screw-joint, 15o At the opposite end of the tube 1 is the back or inlet head-piece, 16, secured to it by the screw portion 17, and at one side it is provided with a projecting lug, 18,'through which the screw portion 19 of the valve-stem socketrod 6 passes, and is rigidly secured at any desired point when adj usted by the jam-nut 20. At the bottom of the socket-rod is awrench-section, 2i, apointing or index hand, 22, and on the lug 18 isa graduated scale, 23.

The inlet-opening 24 is provided with an ordinary screw portion for attachment to a pipe or its equivalent.

The object of the index-hand and graduated scale is to enable the user toadjust the valve to open at any desired temperature.

The brass tube 1 and the Whole, excepting the valve-stem 5 and socket-rod 6, are insulated With a jacket of asbestus, wool, felt, or other suitable Vnon-conducting material, 25, to protect them from the varying temperature of the air outside-a very important feature when the weather is cold and changeable. By this construction it will be noticed the valve opens against the pressure of the steam instead of with it, which is an advantage over others of the usual construction, because the action of the steam tends to keep the valve closed and tight until the expanding and contracting tube contracts and opens the valve by drawing the valve seat away from the valve. As the rod holding the valve is outside and away from the brass tube, which is subjected to the varying temperature of steam and the water of condensation, the expansion and contraction of the valve-rod and valvestem are comparatively nothing, so that all the benefit possible is obtained from the expanding and contracting tube, and the valve or other parts are easy of access for repairs or for other purposes when required.

I claim as my invention# In a steam-trap, the combination of an expanding and contracting tube, a non conducting covering on the outside of the same, a plug, 9, in the top of the head 2, a valve and Valve-stem located centrally and directly below the plug, and a stuffing-box for keeping a tightjoint around the valve-stem, a socketed valve-rod to receive the lower end of the valve-stem and secured by a pin thereto, the valverod having its lower end secured by a screw portion to a lug projecting from the expanding tube, and a nut-section by which the valve-rod is turned for adjustment, substantially as described.

Witnesses:

JAMES SANes'rER, ARTHUR J. SANesrEn.

GEO. B. ROSS.

IOO 

